It definitely seems like there’s a lot of sensors and controls on these machines. Making a functional pump is one thing, but how do you communicate to medical workers the status of the system and patient?
It can be a pretty involved process if intubation is required. And I don’t know if COVID-19 complications could be alleviated without intubation.
This is a nice technical video explaining how non-invasive ventilation works. It looks like CPAP is probably not useful here, but maybe BIPAP could be. This makes me wonder if an air compressor could be used as the pressure source to a bunch of small dual pressure regulators with a valve to switch between low pressure and high pressure. This eliminates the need for a bunch of separate motors.